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Goldbach's double (Posted on 2018-08-04) Difficulty: 3 of 5
Goldbach's unproven conjecture claims that all even integers above 2 can be expressed as the sum of two primes.

What is the largest known number that can be written as a sum of two prime numbers in exactly two ways?

No Solution Yet Submitted by Ady TZIDON    
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  Subject Author Date
SolutionPuzzle SolutionK Sengupta2022-11-10 03:49:50
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